Per [[ko:백:사랑방 (기술)/2013년 10월#사 단축]],please add another Namespace alias for User: Namespaces on Korean Wikipedia.

'사' => NS_USER

Thanks.

Version: wmf-deployment
Severity: enhancement
URL: https://ko.wikipedia.org/wiki/%EC%9C%84%ED%82%A4%EB%B0%B1%EA%B3%BC:%EC%82%AC%EB%9E%91%EB%B0%A9_(%EA%B8%B0%EC%88%A0)/2013%EB%85%84_10%EC%9B%94#.EC.82.AC_.EB.8B.A8.EC.B6.95
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=55342